Caterpillar 303.5C and 303C Mini Hydraulic Excavators Factory Service & Shop Manual

Complete workshop service repair manual with electrical wiring diagrams for Caterpillar 303.5C and 303C Mini Hydraulic Excavators. It's the same service manual used by dealers that guaranteed to be fully functional and intact without any missing page.

Caterpillar 303.5C and 303C Mini Hydraulic Excavators service repair manual (including maintenance, overhaul, disassembling & assembling, adjustment, tune-up, operation, inspecting, diagnostic & troubleshooting…) is divided into different sections. Each section covers a specific component or system with detailed illustrations. A table of contents is placed at the beginning of each section. Pages are easily found by category, and each page is expandable for great detail. The printer-ready PDF documents work like a charm on all kinds of devices.

1,002 pages, bookmarked, Searchable, Printable, high quality PDF

FILE LIST:
RENR9613 - Specifications (303.5C CR and 303C CR Mini Hydraulic Excavators Machine System Specifications)
RENR9614 - Systems Operation (303.5C CR and 303C CR Mini Hydraulic Excavators Hydraulic System)
RENR9615 - Testing and Adjusting (303C CR and 303.5C CR Mini Hydraulic Excavators Hydraulic System)
RENR9617 - Disassembly and Assembly (303.5C and 303C Mini Hydraulic Excavators Machine Systems)
RENR9626 - Schematic (303.5C CR Mini Hydraulic Excavator Hydraulic System)
RENR9627 - Disassembly and Assembly (Mini Hydraulic Excavators Engine Supplement)
RENR9628 - Schematic (303.5C CR Mini Hydraulic Excavator Electrical System)
UENR4045 - Schematic (303C, 303.5C, 303.5D, 303.5E, 304C, 304D, 304E, 305C, 305D, 305E, 305.5D and 305.5E Mini Hydraulic Excavators Air Conditioning System)

 RENR1377 - Systems Operation (Electric Protection System Energize-To-Run for Generator Set, Industrial & Marine Diesel Engines)
    Abbreviations and Symbols
    ETR Component Descriptions
    ETR Introduction
    ETR Junction Box-Switchgear Not Required (OP,WT,OS)
    ETR Junction Box-Switchgear Not Required (OP,WT)
    ETR Junction Box-Switchgear Required (OP,WT,OS)
    Junction Box and Enclosure Group
 RENR1377 - Testing & Adjusting (Electric Protection System Energize-To-Run for Generator Set, Industrial & Marine Diesel Engines)
    Crank Terminate Speed Calibration
    Diode Test
    Electric Protection System Functional Test
    Engine Oil Pressure Switch Test
    General Testing and Adjusting Information
    General Troubleshooting Information
    Magnetic Pickup Test
    Oil Step Speed Calibration
    Overspeed Calibration
    Overspeed Verification Test
    Slave Relay Test
    Troubleshooting the ETR Full Protective System (OP, WT, OS)
    Troubleshooting the ETR Partial Protection System (OP, WT)
    Water Temperature Contactor Switch Test
 RENR3404 - Schematic (TH62, TH63, TH82 & TH83 Electrical System)
    Collage Schematic
    Main Schematic
 RENR3407 - Schematic (TH62, TH63, TH82 & TH83 Telehandler Electrical System)
    Collage Schematic
    Main Schematic
 RENR3415 - Schematic (TH62, TH63, TH82 & TH83 Telehandler Electrical System)
    Collage Schematic
    Main Schematic
 RENR3436 - Disassembly & Assembly (TH62, TH63, TH82, TH83 & TH103 Telehandlers Power Train)
    Axle Shaft - Install
    Axle Shaft - Remove
    Axle Trunnion (Front and Rear) - Remove and Install
    Differential and Bevel Gear - Assemble
    Differential and Bevel Gear - Disassemble
    Differential and Bevel Gear (Front) - Assemble
    Differential and Bevel Gear (Front) - Disassemble
    Differential and Bevel Gear (Front) - Install
    Differential and Bevel Gear (Front) - Remove
    Differential and Bevel Gear - Install
    Differential and Bevel Gear (Rear) - Assemble
    Differential and Bevel Gear (Rear) - Disassemble
    Differential and Bevel Gear (Rear) - Install
    Differential and Bevel Gear (Rear) - Remove
    Differential and Bevel Gear - Remove
    Drive Shaft - Remove and Install
    Engine, Torque Converter and Transmission - Connect
    Engine, Torque Converter and Transmission - Install
    Engine, Torque Converter and Transmission - Remove
    Engine, Torque Converter and Transmission - Separate
    Final Drive and Wheel - Assemble
    Final Drive and Wheel - Disassemble
    Final Drive and Wheel - Install
    Final Drive and Wheel - Remove
    Front Axle (Fixed) - Install
    Front Axle (Fixed) - Remove
    Front Axle (Oscillating) - Install
    Front Axle (Oscillating) - Remove
    Parking Brake - Assemble
    Parking Brake - Disassemble
    Parking Brake - Install
    Parking Brake - Remove
    Rear Axle (Oscillating) - Install
    Rear Axle (Oscillating) - Remove
    Service and Parking Brake - Assemble
    Service and Parking Brake - Disassemble
    Service and Parking Brake - Install
    Service and Parking Brake - Remove
    Service Brake - Assemble
    Service Brake - Disassemble
    Service Brake - Install
    Service Brake - Remove
    Torque Converter - Assemble
    Torque Converter - Disassemble
    Transfer Gear Mount - Remove and Install
    Transfer Gears - Assemble
    Transfer Gears - Disassemble
    Transfer Gears - Install
    Transfer Gears - Remove
    Transmission - Assemble
    Transmission - Disassemble
    Wheel and Tire - Remove and Install
    Wheel Stud Bolts - Remove and Install
 RENR3437 - Disassembly & Assembly (TH62, TH63, TH82, TH83 & TH103 Telehandlers Machine Systems)
    Bank Valve - Assemble
    Bank Valve - Disassemble
    Bank Valve - Install
    Bank Valve - Remove
    Boom - Assemble
    Boom Cylinder - Remove and Install
    Boom - Disassemble
    Boom - Install
    Boom - Remove
    Cab Heater - Install
    Cab Heater - Remove
    Cab - Install
    Cab - Remove
    Compensating Cylinder - Remove and Install
    Control Valve (Compensating Cylinder) - Remove and Install
    Control Valve (Trailer and Towing Hitch) - Assemble
    Control Valve (Trailer and Towing Hitch) - Disassemble
    Counterweight - Remove and Install
    Diverter Valve (Boom Head) - Remove and Install
    Fender - Remove and Install
    Frame Leveling Cylinder - Remove and Install
    Fuel Tank - Install
    Fuel Tank - Remove
    Hitch Cylinder - Remove and Install
    Hydraulic Oil Lines (Boom) - Install
    Hydraulic Oil Lines (Boom) - Remove
    Hydraulic System Pressure - Release
    Hydraulic Tank - Install
    Hydraulic Tank - Remove
    Load Control Valve (Boom Cylinder) - Remove and Install
    Load Control Valve (Frame Leveling Cylinder) - Remove and Install
    Load Control Valve (Stabilizer Cylinder) - Remove and Install
    Load Control Valve (Telescoping Cylinder) - Remove and Install
    Load Control Valve (Tilt Cylinder) - Remove and Install
    Metering Pump (Steering) - Install
    Metering Pump (Steering) - Remove
    Piston Pump (Implement and Steering) - Assemble
    Piston Pump (Implement and Steering) - Disassemble
    Piston Pump (Implement and Steering) - Install
    Piston Pump (Implement and Steering) - Remove
    Piston Pump (Steering) - Assemble
    Piston Pump (Steering) - Disassemble
    Quick Coupler - Assemble
    Quick Coupler - Disassemble
    Quick Coupler - Install
    Quick Coupler - Remove
    Seat - Remove and Install
    Selector Valve (Steering Mode) - Remove and Install
    Solenoid Valve - Remove and Install
    Stabilizer Control Valve - Remove and Install
    Stabilizer Cylinder - Remove and Install
    Stabilizer - Install
    Stabilizer - Remove
    Steering Cylinder - Remove and Install
    Steering Wheel - Remove and Install
    Telescoping Cylinder - Remove and Install
    Tilt Cylinder - Remove and Install
    Window Wiper and Wiper Motor (Front) - Remove and Install
    Window Wiper and Wiper Motor (Roof) - Remove and Install
 RENR3443 - Schematic (TH62, TH63, TH82 & TH83 Telehandler Hydraulic System for Type 1, Type 3 or Type A Control Arrangements)
    Main Schematic
 RENR3444 - Schematic (TH62, TH63, TH82 & TH83 Telehandler Hydraulic System for Type 2, Type 4 or Type B Control Arrangements)
    Main Schematic
 RENR3453 - Disassembly & Assembly (TH62, TH63, TH82, TH83 & TH103 Telehandlers Engine Supplement)
    Air Cleaner - Install
    Air Cleaner - Remove
    Alternator - Remove and Install
    Battery - Remove and Install
    Electric Starting Motor - Remove and Install
    Engine Enclosure - Remove and Install
    Engine Mount (Front) - Install
    Engine Mount (Front) - Remove
    Engine Mount (Rear) - Install
    Engine Mount (Rear) - Remove
    Expansion Tank - Remove and Install
    Fan Guard - Remove and Install
    Muffler - Remove and Install
    Precleaner - Remove and Install
    Radiator - Assemble
    Radiator - Disassemble
    Radiator - Install
    Radiator - Remove
    Transmission Oil Cooler - Install
    Transmission Oil Cooler - Remove
 RENR3455 - Systems Operation (TH62, TH63, TH82 & TH83 Telehandlers Steering System)
    General Information
    Manifold Valve
    Metering Pump (Steering)
    Piston Pump (Implement and Steering)
    Position Sensor (Steering)
    Selector Valve (Steering Mode)
    Steering System
 RENR3455 - Testing & Adjusting (TH62, TH63, TH82 & TH83 Telehandlers Steering System)
    General Information Table
    Hydraulic Oil Contamination - Test
    Machine Preparation for Troubleshooting
    Position Sensor (Steering) - Adjust
    Pump Flow - Test
    Signal Resolver Network - Test
    Solenoid Valve - Test
    Steering System Pressures - Test and Adjust
    Steering System Troubleshooting
    Visual Inspection
    Wheel Alignment - Check and Adjust
 RENR3458 - Schematic (TH62, TH63, TH82 & TH83 Telehandler Hydraulic System for Type 'A' Control Arrangement)
    Main Schematic
 RENR3462 - Specifications (TH62, TH63, TH82 & TH83 Telehandlers Steering and Hydraulic System)
    Bank Valve (Directional Control) 1
    Bank Valve (Directional Control) 2
    Boom Cylinder (Raise_Lower) 1
    Boom Cylinder (Raise_Lower) 2
    Boom Cylinder (Raise_Lower) 3
    Control Valve (Compensating Cylinder) 1
    Control Valve (Compensating Cylinder) 2
    Coupler Cylinder
    Frame Leveling Cylinder
    Hydraulic Tank
    Load Control Valve (Boom Cylinder)
    Load Control Valve (Stabilizer Cylinder)
    Metering Pump (Steering)
    Piston Pump (Implement and Steering)
    Solenoid Valve (Pilot Selector) 1
    Solenoid Valve (Pilot Selector) 2
    Stabilizer Cylinder
    Telescoping Cylinder 1
    Telescoping Cylinder 2
 RENR3473 - Schematic (TH62, TH63, TH82 & TH83 Telehandler Hydraulic System for Type 'B' Control Arrangemen)
    Main Schematic
 RENR5106 - Specifications (TH62, TH63, TH82 & TH83 Telehandlers Braking System)
    Brake Cylinder (Boost)
    Brake Cylinder (Master)
 RENR5106 - Systems Operation (TH62, TH63, TH82 & TH83 Telehandlers Braking System)
    Brake Cylinder (Boost)
    Brake Cylinder (Master)
    Brakes
    General Information
    Parking Brake
    Service Brake
 RENR5106 - Testing & Adjusting (TH62, TH63, TH82 & TH83 Telehandlers Braking System)
    Brake Cylinder (Master) - Test and Adjust
    Braking System Troubleshooting
    General Information
    Machine Preparation for Troubleshooting
    Operation Checks
    Parking Brake Control Cable - Adjust
    Service Brake - Adjust
    Service Brake Air - Purge
    Service Brake Discs - Check
    Visual Inspection
 SEGV3008 - Systems Operation (Fundamentals Electrical System for All Caterpillar Products)
    Basic Circuit Theory
    Basic Electrical Components
    Battery
    Charging System
    Circuit Voltage
    Electrical Measurement
    Electrical Schematic
    Electricity - How It Works
    Magnetism
    Ohms Law
    Solid State Electrical Components
    Starting System
 SENR3130 - Torque Specifications
    Air Brake Fittings
    Air Conditioning Fittings
    Bulkhead Nuts
    English (SAE) Fasteners
    Flare Fittings
    General Information
    Ground Engaging Tool (G.E.T.) Fasteners
    Hose Clamps
    Installation of Fittings
    Metric (ISO) Fasteners
    Miscellaneous Fittings
    O-Ring Face Seal Fittings
    Plugs
    Straight Thread O-Ring Fittings
    Tapered Pipe Thread Fittings
 SENR3685 - Disassembly & Assembly (Alternator - Bosch K1_N1)
    Alternator - Assemble
    Alternator - Disassemble
 SENR3685 - Specifications (Alternator - Bosch K1_N1)
    Alternator
 SENR3685 - Systems Operation (Alternator - Bosch K1_N1)
    Component Description
    General Information
    Normal Operation
 SENR3685 - Testing & Adjusting (Alternator - Bosch K1_N1)
    Alternator Output - Test
    Brush Assembly - Test
    Brush Length - Check
    Capacitor - Test
    Diode Assembly - Test
    Diode Trio - Test
    Field Winding - Test
    Insulated Screw - Check
    Rectifier - Test
    Regulator - Test
    Residual Magnetism - Restore
    Stator - Test
 SENR3685 - Troubleshooting (Alternator - Bosch K1_N1)
    Alternator Charge Rate Is High
    Alternator Charge Rate Is Low
    Alternator Is Noisy
    Alternator Will Not Charge
    General Information
    Service Tools
 SENR3828 - Disassembly & Assembly (RA1.2, R1.4, R2.0, R2.2, R2.5, R2.7, R3.0, R4.5 and R5.5 Series Reduction Starting Motors)
    General Information
    Starting Motor - Assemble
    Starting Motor - Disassemble
 SENR3828 - Specifications (RA1.2, R1.4, R2.0, R2.2, R2.5, R2.7, R3.0, R4.5 and R5.5 Series Reduction Starting Motors)
    Electric Starting Motor
 SENR3828 - Systems Operation (RA1.2, R1.4, R2.0, R2.2, R2.5, R2.7, R3.0, R4.5 and R5.5 Series Reduction Starting Motors)
    Component Description
    General Information
    Normal Operation
 SENR3828 - Testing & Adjusting (RA1.2, R1.4, R2.0, R2.2, R2.5, R2.7, R3.0, R4.5 and R5.5 Series Reduction Starting Motors)
    Component - Test
    Initial Troubleshooting Procedure
    No Load - Test
    Starting Motor - Troubleshoot
 SENR3981 - Schematic - Fluid Power & Electrical Graphic Symbols
    Electrical Power Graphic Symbols
    Fluid Power Graphic Symbols
 SENR5840 - Disassembly & Assembly (TH62, TH63, TH82 & TH83 Telehandlers Power Train)
    Axle Shaft
    Differential
    Drive Shafts
    Engine and Transmission
    Final Drive
    Front Axle (Fixed Frame)
    Front Axle (With Frame Level)
    Hub
    Rear Axle
    Torque Converter
    Transfer Gearbox
    Transmission
    Wheel
 SENR5841 - Disassembly & Assembly (G3B, K3A & L3A Denso Alternators)
    Alternator - Assemble
    Alternator - Disassemble
 SENR5841 - Specifications (G3B, K3A & L3A Denso Alternators)
    Alternator
 SENR5841 - Systems Operation (G3B, K3A & L3A Denso Alternators)
    Component Description
    General Information
    Normal Operation
 SENR5841 - Testing & Adjusting (G3B, K3A & L3A Denso Alternators)
    Component - Test
    General Information
    Initial Troubleshooting Procedure
    T1 Alternator Output - Test
    T2 Electrical System Current - Test
    T3 Charging System - Test
    T4 Alternator Drive System - Check
    T5 Alternator Current - Test
    T7 Identifying Source of Current Draw - Test
    T8 Alternator Overcharging - Test
 SENR5844 - Systems Operation (TH62, TH63, TH82 & TH83 Telehandlers Braking System)
    Brake Cylinder (Boost)
    Brake Cylinder (Master)
    Brakes
    General Information
    Parking Brake
    Service Brake
 SENR5844 - Testing & Adjusting (TH62, TH63, TH82 & TH83 Telehandlers Braking System)
    Brake Cylinder (Master) - Test and Adjust
    Braking System Troubleshooting
    General Information
    Machine Preparation for Troubleshooting
    Operation Checks
    Parking Brake Control Cable - Adjust
    Service Brake - Adjust
    Service Brake Air - Purge
    Service Brake Discs - Check
    Visual Inspection
 SENR5846 - Disassembly and Assembly (TH62, TH63 TH82 & TH83 Telehandlers Machine Systems)
    Attachment Carriage
    Auxilliary Hydraulic Hose
    Auxilliary Selector Valve
    Boom Assembly (Three Section)
    Boom Assembly (Two Section)
    Boom Extend Cylinder Lock Valve (Three Section Boom)
    Boom Extend Cylinder (Three Section Boom)
    Boom Extend Cylinder. (Two Section Boom)
    Boom Raise Cylinder Lock Valve
    Boom Raise Cylinder
    Brake Master Cylinder
    Cab
    Compensating Cylinder
    Compensating Valve (TH62 and TH82)
    Compensating Valve (TH63 and TH83)
    Counterweight
    Disc Brake
    Forks
    Fork Tilt Cylinder Lock Valve
    Fork Tilt Cylinder
    Frame Level Control Valve
    FRAME LEVEL CYLINDER LOCK VALVE
    Frame Level Cylinder
    Fuel Tank
    Fuel Tank Sender Unit
    Hydraulic Pump
    Hydraulic Tank
    Outrigger Assembly
    Outrigger Cylinder Lock Valve
    Outrigger Cylinder
    Parkbrake Assembly And Cable
    Pilot Selector and Differential Lock Control Valve
    Seat
    Steering Console
    Steering Control Valve
    Steering Cylinder
    Steering Pivot
    Steering Tie Rod
    Steering Valve (HMU)
 SENR5847 - Schematic (TH62, TH63, TH82, TH83 & TH103 Telehandler Electrical System)
    Collage Schematic
    Main Schematic
 SENR5851 - Disassembly & Assembly (TH62, TH63, TH82 & TH83 Telehandlers Engine Supplement)
    AIR CLEANER ASSEMBLY
    ALTERNATOR
    EXHAUST SYSTEM
    RADIATOR
    STARTER MOTOR
 SENR5857 - Specifications (TH62, TH63, TH82 & TH83 Telehandlers Steering & Hydraulic)
    Boom Extend Cylinder (8I3467)
    Boom Extend Cylinder 8I4366
    Boom Raise Cylinder (1181943)
    Boom Raise Cylinder 8I5486
    Boom Raise Cylinder (8I6043)
    Compensating Cylinder 8I5488
    Compensating Cylinder 8I6159
    Directional Control Valve 1229703
    Directional Control Valve 8I6425
    Directional Control Valve 8I6426
    Fork Level (Tilt) Cylinder
    Frame Level Cylinder 8I3276
    Hand Metering Unit
    Hydraulic Pump
    Stabilizer Cylinder
 UENR3262 - Disassembly & Assembly - Seal Installation
     Duo-Cone Seals - Install
     Lip Type Seals - Install
     O-Ring Seals - Install - RADIAL, FITTING ASSEMBLY O-RINGS & OTHER O-RING APPLICATIONS

EXCERPT:
Engine Oil Filter Base - Remove and Install
Removal Procedure
Note: Put identification marks on all lines, on all hoses, on all wires, and on all tubes for installation purposes. Plug all lines, hoses, and tubes. This helps to prevent fluid loss and this helps to keep contaminants from entering the system.
1. Disconnect hose assemblies (1) and (2) and remove bolts (3) in order to remove engine oil filter base (4) .
Installation Procedure
...